Machine for surface treating shoe parts



July H6 1935. c. G. BRQSTRQM MACHINE FOR SURFACE TREATING SHOE PARTS Filed April 1, 1932 3 Sheets-Sheet 1 WVE/VUR" July 16, W35. c. s. BROSTRQM MACHINE FOR SURFACE TREATING SHOE PARTS Filed April 1, 1952 3 Sheets-Sheet 2 July 16, 1935. c. G. BROSTROM V 2,@8,,59

MACHINE FOR SURFACE TREATING SHOEYPARTS Filed April 1, 1952 5 Sheets-Sheet 3 Patented July 16, 1935 UNITED STATES PATENT OFFICE MACHINE FOR SURFACE. TREATING SHOE PARTS Application April 1, 1932, Serial No. 602,467

13 Claims.

This invention relates to improvements in machines for surface treating shoe parts to prepare them, for example, for the reception of adhesive for securing them to other shoe parts. As herein illustrated the invention is embodied in a machine for roughing a surface of the welt and adjacent trimmed edges of the inseamed materials of a welt shoe preparatory to coating those parts with cement for attaching them to an outsole. The machine is adapted for use in practicing a method of roughing shoe parts disclosed and claimed in a copending application, Serial No. 573,923, filed November 9, 1931, in the name of Walter H. Wedger.

One feature of the present invention consists in the combination with means for surface treating the welt of a welt shoe, of means constructed and arranged to support the welt while it is being operated upon. In one illustrated embodiment of the invention the welt support consists of a thin blade-like member which is adapted to project into the welt crease of a shoe in such a man'- her as to support the welt against the thrust of the surface treating tool (herein exemplified as a rotary roughing wheel) and also toguide the shoe as it is fed past the wheel.

For the purpose of protecting the inseam stitching from being injured by the action of the roughing tool the illustrated Welt support and guide is made with an upwardly convex upper surface constructed and arranged to offset upwardly the portion of the welt being acted upon so as to close the stitch-receiving groove in the welt above the line of stitches. In the illustrated machine the construction and arrangement of the welt support are further such as to support the welt in position to be most efiectively operated upon by the roughing meanswhile enabling the shoe-to be held in such position that the roughing means will act also upon the trimmed edges of the other inseamed materials of the shoe, i. e., the upper and the channel lips or between substance of the insole. In order to facilitate the positioning of the welt support within the welt crease of the shoe, the illustrated welt support is made movable to and from its operative or work supporting position and, as shown, operator-controlled means is provided for retracting the welt support to a position in which it is better adapted to enter the welt crease and for thereafter returning the welt support to operative position.

In another illustrated embodiment of the invention the welt support and guide is in the form of rotatable disk and means is provided for positively rotating the disk in a direction to feed the work past the operating tool. As illustrated, also, the welt support is so located relatively to the operating tool that the thrust of the tool will tend to swing the work in the direction in which the work must turn as the operation being performed thereon progresses around the margin of the shoe bottom and thus to insure against any tendency of the shoe to move away from the welt support and thus cause the latter to ride out of the welt crease while the toe portion of the shoe, for example, is being acted upon.

The invention also consists of other novel features of construction and combinations and arrangements of parts hereinafter described and claimed.

The invention will be described in connection with the accompanying drawings, in which Fig. 1 is a view in side elevation, partially broken away, of the head of a machine embodying the present invention; a

Fig. 2 is a top plan View of the machine;

Fig. 3 is an elevational view of the welt support and a portion of the roughing tool showing these parts in operative relation to a shoe;

Fig. 4 is a sectional detailed view on an enlarged scale illustrating the mode of operation of the roughing tool and the welt support;

Fig. 5 is a plan View of the end of the welt support illustrating the manner in which it supports the welt;

Fig. 6 is a sectional view of the welt support taken along the line VI-VI of Fig. 5; and

Fig. '7 is a side elevational view of a portion of the head of a machine embodying an alternative form of welt supporting and guiding means.

Referring first to Figs. l'to 5, inclusive, the machine therein illustrated comprises a power driven rotary roughing tool l6, and a work supporting and guiding member [2, hereinafter referred to as the welt support, which is adapted to enter the welt crease of a welt shoe, such as'the shoe l4 shown in Fig. 3, to support the welt against the thrust of the roughing tool and to guide the shoe as it is fed past the tool. Both the roughing tool 10 and the welt support l2 are mounted upon a head It which is supported upon a pedestal I8.

The illustrated roughing tool it! is in the nature of a narrow wheel or roll and while, as shown, the roll is of substantial size it is desirable in many instances to employ one of considerably less di ameter. Moreover, roughing tools of various types may advantageously beemployed in the present machine. For purposes of illustration, however, a roughing tool has been selected of a to a shaft 22 by means of a taper pin 24.

type in which the roughing element consists of a multiplicity of short wire bristles 26. As shown, the bristles 26 project from a flexible band 28 which encircles a roll Zll that is fixedly secured The illustrated band 28 consists of a strip of card cloth having the usual closely arranged and slightly bent bristles which project substantially at right angles to the face of the strip and, as shown, the band 28 is secured. to the roll 26 by means of a plurality of adjustable clamping studs 39, the bristles 26 having been removed from the band at spaced localities as to enable the clamping studs 3% to engage the outer face of the band at those localities and to draw portions of thefband into a series of notches 34 in the periphery of the roll. As illustrated,,the clamping studs 36 are carried by levers 36 which are pivotally mounted upon one side of the roll 25 and each of which has an inner end portion arranged to be engaged by a cone nut 38 (Fig. 2) that is threaded upon one end of the tool shaft 22 and is adapted to be locked in position on the shaft by means of a check nut 48. The relative arrangement of the cone nut 38, the levers 36, and the clamping studs 3G is such that by turning the nut 38 the levers 36 may be adjusted to increase or diminish the tension exerted by the clamping studs upon the band 28. By this means the tension of the band may be adjusted so that the portions of the band located between the clamping studs will be forced outwardly a short distance away from the periphery of the roll Ed by the action of centrifugal force when the tool is being driven at high speed. In this way an air cushion is provided for the bristles while they are in contact with the work, thus enabling the tool to have a soft, sensitive action upon the work which may be varied in accordance with the character of the material operated upon by adjusting the clamping studs to vary the amount of tension applied to the band 28. The band 28 is held against edgewise' displacement relatively to the roll 20 by means of pins 42 which extend inwardly through apertures in the band 28. The above-described means for adjustably securing the band 28 to the roll is substantially the same as that employed for a similar purpose in the machine disclosed in my copending application Serial No. 594,529, filed February 23, 1932, and reference may be had to said application for details of construction not fully disclosed herein.

The roughing tool it is mounted in the head it? with provision for adjustment toward and away from the welt support M for the purpose of varying the depth to which the bristles are permitted to'penetrate into the work and also in order to compensate for the wearing away of the bristles. For this purpose the tool shaft 22 is journaled in a bearing lfi formed in the front end of an arm dathe rear portion of which is mounted to turn upon a sleeve carried by a bracket 52 which is secured, by means of screws 5%, to the head l6. The arm it is supported by means of a coiled spring 5 the upper end of which bears against the arm and the lower end of which engages a forward projection 53 of the bracket 52, the spring being held in place by means of a rod 66 which is pivoted at 52 to the bracket projection E18 and which extends upwardly through the coils of the spring and through an aperture in the arm 48 and is provided at its upper end with a thumb nut 64 arranged to engage the arm 48 and to serve as a stop to limit upward movement of the arm under the action of the spring 56 and thus to determine the operative position of the roughing tool. Vertical adjustment of the roughing tool may be effected by turning the thumb nut 64.

The roughing tool It is driven by means comprising a belt 18 passing over a pulley 80 that is fast on the tool shaft 22 and over a pulley 82 that is fast upon one end of a shaft 8 3 that is journaled within the sleeve 55}. The shaft 84 is driven by means of a belt 86 which passes over a pulley 88 affixed to the shaft. The belt 86 is adapted to be driven by means of a suitable pulley upon a power shaft (not shown). The roughing tool is driven in a counterclockwise direction, as viewed from theright-hand side of the machine, in order that it shall have a tendency to urge the Work toward the welt support I2.

The welt support If, in the embodiment of the invention illustrated in Figs. 1 to 6, inclusive, is a thin, smooth-edged and smooth-surfaced blade or wing formed at the free upper extremity of a fixed arml l which is mounted with provision for a small amount of movement in a vertical plane to and from a working position. The thinness of the blade l2 which supports the welt enables it to extend into the crease between the upper and welt of a welt shoe and the smoothness of the edge and surface of the blade enables it to support the welt without interfering with the feeding movement of the shoe past the welt support. As shown, the tip of the blade l2 has a circular edge curvature enabling the blade to extend into the bottom of the welt crease even along the shank of the shoe Where the edge curvature of the shoe bottom is concave, and facilitating such swinging of the sole in a horizontal plane as is necessary to cause the roughing operation to progress around the toe and other convexly curved portions of the shoe bottom margin. Furthermore, the blade l2 has a spherically convex upper surface adapted to displace upwardly the portion of the welt supported thereby, as shown in Fig. 4, wherein the welt of a shoe which is being operated upon is indicated at 98, the upper at ran, the insole at I62, and the inseam stitching at i656. As indicated this upward displacement of the welt 98 serves to close the groove in the welt in which the inseam stitches 504 are received so that the latter will be effectively protected from injury by the roughing tool. As indicated at 66 in Figs. 5 and 6, the leading edge portion of the welt support [2 is bent downwardly an amount sufficient to insure that the welt support will not be per mitted to enter any one of a series of slits or notches, such as the notches ms shown in Fig.5, which may be cut inwardly from portions of the outer edge of the welt for the purpose of facilitating the bending of the welt at the toe of the shoe. As the portion of the welt which overlies the welt support is deflected upwardly by the convexity of the welt support, the notches lei! are opened up in such a manner that in the ab sence of the flange E05, there might be some tend ency for the welt support to ride out of the welt crease through one of these notches. Such action, however, is effectively prevented by the presence of the flange N35. The welt' support 52 is so located relatively to the roughing tool l9 and is inclined at such an angle as to present the portion of the welt which is to be operated upon to the front of the roughing wheel at a point somewhat below the horizontal axial plane of the latter. With the work held in this relation to the roughing wheel and supported at an angle de-- termined by the angle of the welt support, as best shown in Fig. 3, the operator is enabled to look downwardly upon the work so that he may conveniently observethe progress of theroughing operation.

The welt support arm 94 is secured to a carrier H0 which is pivotally mounted in the head I6 to enable the welt support to be moved from an operative position, indicated in Fig. 1, to an inoperative position removed a short distance from the periphery of the roughing tool so as to facilitate the positioning of a shoe with the welt supporting and guiding blade I2 projecting into the welt crease. As shown, the welt support carrier H6 comprises a curved arm II2 the upper end of which is secured to a rockshaft H4 and mounted to turn in bearings formed in the head I6. A horizontal rod II6 rigidly secured at its rear end by means of a binding screw I IB to the arm H2 carries at its front extremity a sleeve I26 which supports an angle block I22 to which the welt support arm 94 is secured. The sleeve I26 is split and rigidly secured to the rod II 6 by means of a binding screw I24 arranged to clamp the split sleeve to the rod. The angle block I22 is fixedly secured to the sleeve I20 by means of a binding screw I 26 which is threaded into the sleeve I20 and extends through a horizontally elongated slot I28 in the block I 22, the slot I28 extending ,at right angles to the rod II 6 to permit adjustment of the welt support in a direction crosswise of the periphery of the roughing tool. Preferably the adjustment of the block I22 relatively to the sleeve I20 is Such that the point of engagement of the edge of the welt supporting blade I2 with the bottom of the welt crease will be offset relatively to the center of the area of engagement of the roughing tool with the work in the direction toward which the work is being fed, thereby insuring that the thrust of the roughing tool upon the work will tend to swing the work in a counterclockwise direction (viewed from above) so as to maintain proper engagement of the shoe with the welt support and thus to facilitate the feeding and guiding of the shoe particularly during operations around the toe. This relative adjustment of the welt support and roughing tool may be varied by loosening the binding screw I26. The block I22 is maintained in fixed angular relation to the sleeve I 20 by means of a rib I30 on the block which extends into a corresponding groove in the sleeve I20, the rib and the groove extending at right angles to the rod II6 to permit the above adjustment of the welt support. The welt support finger 94 is secured to the block I22 by means of a binding screw I32 which is threaded into the block and extends through a vertically elongated slot I34 in the finger 94. Either or both of the clamping screws I24 and I32 may be loosened to facilitate adjustment of the welt support I2 toward and from the periphery of the roughing tool. i

While the work is being operated upon the welt support I2 is maintained in the operative relation to the roughing tool shown in Figs. 1 and 3 by means of a stiff spring I38 which engages the lower end of the arm H2 and normally holds it against the flattened surface I40 of a cam I42 secured to a horizontal rockshaft I44 which is mounted to turn in the head I6. The cam I42 is adapted to be turned by means of a handle I46 secured to the rockshaft to engage the high portion N6 of the cam I42 with the arm II2 to rock the latter rearwardly against the action of the spring I36 so as to swing the weltsupport outwardly and downwardly a short distance away from the periphery of the roughing tool.

An extension I36 of the handle I46 is adapted to engage a portion of the head I6 to limit the turning movement of the cam I42. As shown, the spring I38 encircles and is partially supported by a rod I50 the front end of which is pivoted at I52 to the arm H2 and the rear portion of which extends through a bearing in'a thimble I54 which is threaded into the rear portion of the head I6. The thimble I54 provides a housing for the rear extremity of the spring I38 and is provided with a knurled portion I56 by means of which the thimble may be turned to vary the compression of the spring.

In order properly to present a shoe to the action of the roughing tool the handle I46 is first raised to retract the welt support I2 from its operative relation to the roughing tooland the shoe to be operated upon is held bottom upward at substantially the angle shown in Fig. 4, the welt at one side of the heel portion of the shoe being placed over the welt support I2 and the shoe positioned so that the welt support extends into the welt crease into engagement with the bottom of the latter so that it may function to guide the shoe as well as to support the welt as the shoe is fed manually past the welt support and beneath the roughing tool. After the shoe has been positioned as above described the handle I46 is lowered, permitting the spring I38 to return the welt support to operative position. As the shoe is fed the support I2 receives the thrust of the roughing tool thus enabling the latter to operate effectively to roughen the exposed surface of the welt. Because of the convexity of the upper face of the welt support the portion of the welt engaged thereby and consequently the portion of the welt which is being operated upon by the roughing tool is deflected upwardly to such an extent as to insure not only that the entire surface of the welt will be acted upon by the tool but also to close the groove or channel in which the inseam stitches are seated to such an extent as practically to cover the stitches and thus to protect them from injury as a result of contact with the bristles of the roughing tool. The shoe is supported by the operator at such an angle with respect to theroughing tool that the latter in addition to roughing the surface of the welt engages and roughs also the trimmed edges of the upper and the trimmed portions of the channel lip or between substance of the insole. As hereinbefore explained, the downwardly curved flange I06 at the leading edge of the welt support insures against any tendency of the welt support to ride out of the welt crease through any one of a series of open notches such as may be formed inthe outer edge of the Welt at the toe or other convexly curved portion thereof. To provide for steadying the work and assisting the operator in holding it so that the edge of the welt support will continuously engage and support the welt throughout the full width of the latter, particularly while operating around the toe, a hookshaped finger hold I58 is secured to the under side of the welt support. This hook-shaped member I 58 is adapted to be engaged by one finger of the operators hand which supports the portion of the shoe being operated upon, thus steadying the operators hand and in that way steadying the shoe. The finger hold 58 is so located, relatively to the welt support and the shoe as best shown in Fig. 3, that the operator, by pulling upon it can keep the edge of the welt support against the bottom of the welt crease, thus insuring proper support of the Welt throughout to drive the welt support disk Iii].

the roughing operation upon the shoe. of the circular edge contour of the welt support the shoe may readily be held-in such horizontal angular relation to the plane of rotation of the roughing tool that the latter will have an operative movement at an obliqueangle to the direction of Work feed such that the force applied to the work by the tool in such movement shall be resolvable into compartments, one of which is in the direction of work feed and the other of which is toward the welt support. In this way the roughing tool may be made to assist in the feeding of the work. Moreover, when the work is thus presented to the roughing tool the periphery of the tool will travel across the face of the welt in a direction oblique to the edge of the Welt and to the line of the inseam stitches and thus will have less tendency to open up the stitch-receiving groove in thewelt and thus to engage and possibly break or otherwise damage the stitches,

For receiving and carrying away the dust produced by the roughing operation a conduit IBii (Fig. 2), leading to the pipes of a factory suction system is connected at its forward end to a casing I62 which partially encloses the roughing brush I butwhich is open at the front of the machine to expose the operative portion of the brush and the welt support I2. As shown, the upper portion of the casing I52 is made separate' from the lower portion and is hinged to the latter at I64 so that it may be swung backwardly to facilitate replacement of the bristles of the roughing tool.

In Fig. 7 there is shown an alternative form of work support wherein the means for supporting the welt against the thrust of the roughing tool comprises a drivenfeed disk III]. The disk III] is secured to the rear end of a short shaft II 2 which is journaled in the upper end of an arm I'M which extends upwardly and forwardly from a carrier H6. The carrier I16 is similar to the carrier I Iii already described although it is somewhat differently shaped to provide a bearing I18 for a power-driven shaft I89; which'is connected As shown, the carrier H8 is secured to the rockshaft H4 and is provided with 2. depending portion I82 which corresponds to the lower end of the arm H2 and is acted upon by the spring I38 and by the cam I42, the construction and operation of a which have already been described. The carrier I'IB is provided, below the bearing I18, with a split sleeve I84 for receiving the rear extremity of the arm I'M. The sleeve I84 is adapted to be contracted by means of a binding screw I86 to secure the arm I'M adjustably to the carrier I76. The shaft I88 is connected by means of a telescoping link I88 and universal joint connections I90, I92 with a shaft I94 which is journaled in the arm I'M and has fixed thereon a gear I96. The gear I96 meshes with an idle gear I98 carried by the arm I'M and the gear I98 meshes with a gear 2M which is fast upon the shaft I'IZ which carries the welt supporting disk H9. The telescoping link I 8 permits adjustmentof the disk I'IB toward and from the roughing tool to accommodate different thicknesses of welts as well as to compensate for the wearing away of the roughing tool.v The shaft I853 is driven by means of a sprocket chain 282 whichpasses over a sprocket 204 on the shaft I88 and is adapted to be driven from any suitable source of power.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United. States is:

Because ceiving face, of the welt of a welt shoe, the combination with a roughing wheel having a peripheral roughing surface, of means for supporting the wheel with its axis substantially horizontal, and means constructed and arranged to hold the welt of a shoe against the periphery of the roughing wheel in a position intermediate between the bottom of the wheel and the axial plane thereof to facilitate observation and control of the roughing operation.

3. In a machine for roughing the outsole-receiving face of the welt of a welt shoe, in combination, a roughing tool, and means for directly supporting the welt of a shoe against the thrust of the roughing tool, the construction and relative arrangement of said tool and said supporting means being such as to enable portions ofsaid tool to move in substantially straight paths across the welt from one edge to the other.

4. In a machine for roughing the outsole-receiving face of the welt and adjacent edges of the inseamed materials of a welt shoe, a rotary roughing wheel, a welt support adapted to project into the welt crease of a shoe to support the welt against the thrust of said wheel, the wheel being mounted to rotate in a plane transverse'to that of the welt of the shoe, and means'for rotating said wheel in a direction tending to maintain engagement of the welt support within-the welt crease of the shoe. a

5. In a machine for roughing the outsole-receiving face of the welt of a welt shoe, in combination, a roughing tool, means for directly supporting the welt of a shoe against the thrust of said tool, said means being capable of yielding to accommodate itself to variation in thickness of the work, means for adjusting said tool toward and from said supportingfzneans, and means for moving said supporting means toward and from operative position.

6. In a machine for roughing the outsole-receiving face of the welt of a welt shoe, in combination, a roughing wheel adapted to have peripheral engagement with the work, means for supporting the welt of a shoe against the thrust of the roughing wheel, and means for adjusting the roughing wheel toward and from the welt support.

7. In a machine for surface treating the welt of a welt shoe, in combination, a surface treating tool, a welt support constructed and arranged to enter the welt crease of a shoe to support the welt and guide the shoe as the shoe is fed past said tool, and means adapted to be grasped by the operator to steady the shoe while the shoe is being operated upon, said means being arranged substantially in line with the welt crease of the shoe to facilitate holding the shoe with the bottom of the crease against the welt support.

8. In a machine for surface treating the outsole-receiving face of the welt of a welt shoe, in combination, a surface treating tool, and means for feeding a shoe to advance the Welt progressively past said tool, said means being constructed and arranged to support the welt and also to guide the shoe as the shoe is being fed.

9. In a machine for roughing the outsole-receiving face of the welt and the trimmed edges of the inseamed materials of a welt shoe, in combination, a roughing tool, a welt support comprising a rotary disk adapted to extend into the welt crease to support the welt against the thrust of said tool said support having a spherically convex welt-engaging surface, and means for rotating the disk to feed the work past the tool.

10. In a machine for roughing the outsole-receiving face of the welt of a welt shoe, in combination, a roughing tool, a welt support comprising a rotary disk adapted to extend into the welt crease to support the welt against the thrust of said tool, said welt support being mounted to yield to accommodate variations in welt thickness, and means for rotating said disk to feed the work past said tool, said means including driving connections constructed and arranged to permit yielding movement of said welt support.

11. In a machine for roughing the outsole-receiving face of the welt and the trimmed edges of the inseamed materials of a welt shoe, in combination, a roughing tool, and a welt support adapted to extend into the welt crease to support the welt against the pressure of said tool, said welt support having an upwardly bulging welt engaging surface, said surface being convex longitudinally of the welt to facilitate feeding of the shoe and being convex transversely of the welt to deflect the portion of the welt being operated upon by the roughing tool to close the stitch channel along the deflected portion of the welt and thus to protect the welt stitches from the action of the roughing too-l.

12. In a machine for surface treating the at,- taching face of the welt provided with slits or notches and the trimmed edges of the inseamed materials of a welt shoe, in combination, a surface treating tool, and a welt support adapted to extend into the welt crease and having a convex upper surface to support the welt against the pressure of said tool, the convexity of the upper surface of the welt support being more pronounced adjacent to the leading edge of the support to insure that the welt support will receive the slit portions of the Welt and guide them to overlie the support for proper presentation to the treating tool.

13. In a machine for surface treating the attaching face of the welt provided with slits or notches and the trimmed edges of the inseamecl materials of a welt shoe, in combination, a surface treating tool, and a welt support adapted to extend into the welt crease and having a bulging upper surface for supporting the welt against the pressure of said tool and deflecting the supported portion upwardly, said welt support hav- 7 CHARLES I G. BROSTROM. 

